Caleb spends Day 3 following fresh footprints to the creek tunnel: he wades through cold water, finds a half‑submerged entrance framed by twisted roots, and watches faint, spiraling lights rise from the depths. He documents bioluminescent residue, discovers a small metallic device near the threshold, and feels the town’s quiet tighten into something urgent and uncanny as the bridge above hums with distant, rhythmic pulses.